牛痘 niúdòu cowpox Definitions Defs Origin Strokes Stroke Words Sentences Sents 种牛痘 zhòngniúdòu to vaccinate against smallpox To inoculate a person with the cowpox vaccine to prevent smallpox.牛痘苗 niúdòumiáo smallpox vaccine Vaccine made from the liquid in cowpox sores used to prevent smallpox.牛痘病 niúdòubìng cowpox
